Solved

Storing a 2-dimensional array within a 1-dimensional array

Posted on 2013-12-11
2
261 Views
Last Modified: 2013-12-11
All I'm trying to do here is store a collection within a collection...the collection being arrays. My problem is the syntax. I have built the 2-dimensional array, now I wish to add it to the 1-dimensional array but not sure how to do it. Here is my code below.

    Dim idx As Integer = 0
    Dim arr1() As String
    Dim arr2(,) As String

    Redim Preserve arr1(idx)

    For x As Integer = 0 To 14
         Redim Preserve arr2(x, y)
         For y As Integer = 0 To 9
              Redim Preserve arr2(x, y)
              arr2(x, y) = "Test " & x & " and " & y        
         Next
    Next

    arr1(idx) = arr2

I'm getting an error where I assign arr2 to arr1. It says "Value of type 2-dimensional array of String cannot be converted to String". I also tried this:

    arr1(idx) = arr2()

The above syntax gave me the error "Number of indices is less than the number of dimensions of the indexed array".
0
Comment
Question by:BlakeMcKenna
2 Comments
 
LVL 15

Accepted Solution

by:
ChloesDad earned 500 total points
ID: 39711993
Am I correct in that what you want to do is have a 1 dimensional array of pointers to two dimensional arrays? If so then you really want to use a jagged array that has 3 dimensions

Dim Arr1()()() As string =new String()()() {}
or
Dim Arr1(1)(14)(9) As string

idx = 0

     For x As Integer = 0 To 14

         Redim Preserve arr1(idx)(x)( y) ' I have never tried this with jagged arrays so I don't know if it works

         For y As Integer = 0 To 9
          Redim Preserve arr1(idx)(x)( y)
             arr1(idx)((x)(y) = string.format("Test  {0} and {1}", x.tostring , y.tostring)        
         Next
    Next

I have changed the string concatenation to a string.format  as string concatenation is highly inneficient as each & creates a new string.
0
 

Author Closing Comment

by:BlakeMcKenna
ID: 39712012
Thanks ChloesDad...I didn't use that exact code but it did jar my memory and now I got it working.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This tutorial demonstrates one way to create an application that runs without any Forms but still has a GUI presence via an Icon in the System Tray. The magic lies in Inheriting from the ApplicationContext Class and passing that to Application.Ru…
The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now